ABSTRACT

Figure 3 plots the variations of (a) and (b) thickness across the interface of a diffusion couple, Ni/Ni-45mol%Al [4]. The results were obtained with Inspection reveals that the M3AI intermetallic phase (y’ phase) formed at the couple interface and there are abrupt changes in at the y/y' and y’/p interfaces where y represents the Ni-rich solid solution phase and p the NiAl intermetallic phase.